oj.uz

답안 #609552

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
609552 2022-07-27T17:13:10 Z skittles1412 늑대인간 (IOI18_werewolf) C++17
15 / 100
 4000 ms 89076 KB 
#include "bits/extc++.h"

using namespace std;

template <typename T>
void dbgh(const T& t) {
    cerr << t << endl;
}

template <typename T, typename... U>
void dbgh(const T& t, const U&... u) {
    cerr << t << " | ";
    dbgh(u...);
}

#ifdef DEBUG
#define dbg(...)                                              \
    cerr << "L" << __LINE__ << " [" << #__VA_ARGS__ << "]: "; \
    dbgh(__VA_ARGS__);
#else
#define dbg(...)
#define cerr   \
    if (false) \
    cerr
#endif

using vi = vector<int>;

#define endl "\n"
#define long int64_t
#define sz(x) int((x).size())

template <typename T>
ostream& operator<<(ostream& out, const vector<T> &arr) {
    for (int i = 0; i < sz(arr); i++) {
        if (i) {
            out << " ";
        }
        out << arr[i];
    }
    return out;
}

struct DSU {
    vector<int> p;

    DSU(int n) : p(n, -1) {}

    int find(int u) {
        return p[u] < 0 ? u : find(p[u]);
    }

    void merge(int u, int v) {
        u = find(u);
        v = find(v);
        if (u != v) {
            p[u] = v;
        }
    }
};

struct Tree {
    int n;
    vector<int> ord;
    vector<pair<int, int>> ranges;
    vector<vector<int>> lift, graph;

    Tree(const vector<int>& p)
        : n(sz(p)), ranges(n), lift(__lg(n) + 2, vector<int>(n)), graph(n) {
        vector<int> roots;
        for (int i = 0; i < n; i++) {
            if (p[i] >= 0) {
                graph[p[i]].push_back(i);
            } else {
                roots.push_back(i);
            }
        }
        for (auto& a : roots) {
            dfs(a);
        }
        lift[0] = p;
        for (int i = 0; i <= __lg(n); i++) {
            for (int j = 0; j < n; j++) {
                if (lift[i][j] == -1) {
                    lift[i + 1][j] = -1;
                } else {
                    lift[i + 1][j] = lift[i][lift[i][j]];
                }
            }
        }
    }

    void dfs(int u) {
        ranges[u].first = sz(ord);
        ord.push_back(u);
        for (auto& v : graph[u]) {
            dfs(v);
        }
        ranges[u].second = sz(ord);
    }

    template <typename T>
    pair<int, int> bsearch(int u, const T& t) {
        for (int i = __lg(n); i >= 0; i--) {
            int v = lift[i][u];
            if (v != -1 && t(v)) {
                u = v;
            }
        }
        return ranges[u];
    }
};

vector<int> solve(const vector<int>& arr1,
                  const vector<int>& arr2,
                  const vector<array<int, 4>>& queries) {
    int n = sz(arr1), q = sz(queries);
    assert(sz(arr1) == sz(arr2));
    vector<int> ans(q);
    for (int qi = 0; qi < q; qi++) {
        auto& [l1, r1, l2, r2] = queries[qi];
        bool vis[n] {};
        for (int i = l1; i < r1; i++) {
            vis[arr1[i]] = true;
        }
        for (int i = l2; i < r2; i++) {
            ans[qi] |= vis[arr2[i]];
        }
    }
    return ans;
}

vi check_validity(int n, vi us, vi vs, vi qsrc, vi qdest, vi ql, vi qr) {
    int q = sz(qsrc);
    vector<int> graph[n];
    for (int i = 0; i < sz(us); i++) {
        graph[us[i]].push_back(vs[i]);
        graph[vs[i]].push_back(us[i]);
    }
    DSU inc(n), dec(n);
    for (int i = 0; i < n; i++) {
        for (auto& a : graph[i]) {
            if (a <= i) {
                inc.merge(a, i);
            }
        }
    }
    for (int i = n - 1; i >= 0; i--) {
        for (auto& a : graph[i]) {
            if (a >= i) {
                dec.merge(a, i);
            }
        }
    }
    Tree inct(inc.p), dect(dec.p);
    dbg(inc.p, dec.p);
    vector<array<int, 4>> queries(q);
    dbg(inct.ord, dect.ord);
    for (int qi = 0; qi < q; qi++) {
        int src = qsrc[qi], dest = qdest[qi], l = ql[qi], r = qr[qi];
        auto [il, ir] = inct.bsearch(dest, [&](int x) -> bool {
            return x <= r;
        });
        auto [dl, dr] = dect.bsearch(src, [&](int x) -> bool {
            return x >= l;
        });
        dbg(il, ir, dl, dr);
        queries[qi] = {il, ir, dl, dr};
    }
    return solve(inct.ord, dect.ord, queries);
}

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 300 KB Output is correct
5 Correct 1 ms 296 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 300 KB Output is correct
5 Correct 1 ms 296 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 21 ms 1488 KB Output is correct
11 Correct 16 ms 1364 KB Output is correct
12 Correct 5 ms 1452 KB Output is correct
13 Correct 30 ms 1544 KB Output is correct
14 Correct 28 ms 1492 KB Output is correct
15 Correct 21 ms 1476 KB Output is correct

Subtask #3
0 / 34.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1630 ms 87240 KB Output is correct
2 Execution timed out 4072 ms 89076 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 300 KB Output is correct
5 Correct 1 ms 296 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 21 ms 1488 KB Output is correct
11 Correct 16 ms 1364 KB Output is correct
12 Correct 5 ms 1452 KB Output is correct
13 Correct 30 ms 1544 KB Output is correct
14 Correct 28 ms 1492 KB Output is correct
15 Correct 21 ms 1476 KB Output is correct
16 Correct 1630 ms 87240 KB Output is correct
17 Execution timed out 4072 ms 89076 KB Time limit exceeded
18 Halted 0 ms 0 KB -